Mohajeri, Massoumeh, Gholam Hossein Rounaghi, and Saman Sedagat. 2010. “Therodynamic Studies on Complexation of Cu2+, Ag+ and Tl+ Metal Cations With 4?, 4?,(5?)-Ditert-Butyldibenzyl-18-Crown-6 in Acetonitrile- Dimethylformamide Binary Solutions”. Asian Journal of Chemistry 20 (8):6163-70. https://asianpubs.org/index.php/ajchem/article/view/12965.